What is e-signature integration?

E-signature integration lets your app send documents to users for signing electronically — without printing, scanning, or chasing PDFs over email. The user receives a link, reviews the document, and signs using their mouse, touchscreen, or typed name. The signed document is returned with a tamper-evident audit trail showing who signed, when, and from where.

Common providers integrated into Australian apps include DocuSign, Dropbox Sign (formerly HelloSign), Adobe Acrobat Sign, and PandaDoc. Each offers an API that your app can call to send documents and receive notifications when signing is complete.

For a real estate agency, this means contracts sent and returned in minutes. For a trade business in the Southern Highlands, service agreements signed on-site via tablet before work begins. For a healthcare provider, consent forms signed before an appointment.

When does your app need it?

• Your business sends contracts, agreements, or consent forms that currently require a wet signature
• You want to automate document routing — generated from your data and sent without manual steps
• Compliance requires a formal record that a document was reviewed and accepted
• You're dealing with rental agreements, service contracts, employment forms, or financial disclosures
• You want to reduce turnaround time from days to minutes
• You're integrating with a legal, healthcare, or financial workflow

How much does it cost?

Adding e-signature capability typically adds 5–11 hours of development — roughly $1,000–$2,000 AUD.

This range covers integration with a provider's API, building the send/receive workflow, storing signed documents, and notifying relevant parties.

Cost increases when:

• Documents are generated dynamically from your app's data (vs. uploading a static template)
• Multiple signatories need to sign in sequence (e.g. employee then manager)
• You're managing a large library of document templates
• You need to handle declined signatures, expiry, and reminders

Ongoing provider costs: DocuSign and similar charge per envelope (signed document) — typically $1–$4 per envelope depending on your plan. Factor this into your operational budget.

How it's typically built

Most integrations use a provider's REST API: your app generates or selects the document, calls the API to create an "envelope" with the document and recipient details, and the provider handles the signing UI, notifications, and storage. When signing is complete, a webhook notifies your app, which downloads the signed document and stores it.

For document generation, PDF templates are populated with data from your app (customer name, amount, date) before being sent. Tools like PDFKit or headless Chrome are commonly used for this.

Australian legal note: Electronic signatures are legally recognised under the Electronic Transactions Act 1999 for most commercial contracts. However, certain documents — including some forms of will, statutory declarations, and some land transactions — still require wet signatures under specific legislation. Your developer can't advise on this; it's worth a quick confirmation with your lawyer for document types you're unsure about.

Questions to ask your developer

• Does this comply with the Electronic Transactions Act? It should — any reputable provider's signatures do — but ask for confirmation.
• Who stores the signed documents? You should have your own copy, separate from the provider's storage.
• What's the audit trail? You should be able to see IP address, timestamp, and device for each signature event.
• What happens if the recipient doesn't sign? There should be a reminder flow and an expiry policy.
• How is this connected to your document management? Signed documents should flow automatically into the right place in your system — not require manual downloading.

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See also: Document management · Contract template management · App cost calculator